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migration/rdma: unregister fd handler

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Unregister the fd handler before we destroy the channel,
otherwise we've got a race where we might land in the
fd handler just as we're closing the device.

(The race is quite data dependent, you just have to have
the right set of devices for it to trigger).

Corresponds to RH bz: https://bugzilla.redhat.com/show_bug.cgi?id=1666601

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20190122173111.29821-1-dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2019-01-22 17:31:11 +00:00
parent 6d99c2d41c
commit fbbaacab27
1 changed files with 1 additions and 0 deletions
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migration/rdma.c
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@ -2321,6 +2321,7 @@ static void qemu_rdma_cleanup(RDMAContext *rdma)
rdma->connected = false;
}
qemu_set_fd_handler(rdma->channel->fd, NULL, NULL, NULL);
g_free(rdma->dest_blocks);
rdma->dest_blocks = NULL;